Embedded tube type dispensing head and dispensing valve device having the same

Abstract

This utility model discloses a tube-type dispensing head and a dispensing valve device having the same. The tube-type dispensing head includes a support base and a dispensing needle. The upper end of the support base has a funnel-shaped dispensing cavity facing downwards, and the bottom of the support base has a fixed channel extending vertically into the bottom of the funnel-shaped dispensing cavity. The dispensing needle is interference-fitted into the fixed channel, and its lower end extends downwards to form a lower extension portion protruding outside the lower part of the fixed channel. The support base is made of tungsten carbide or ceramic; the dispensing needle is made of stainless steel. Advantages: Because the tube-type dispensing head includes a support base and a dispensing needle, they can be manufactured separately and then assembled. The support base is made of tungsten carbide or ceramic, and the dispensing needle is made of stainless steel. Since the dispensing needle made of stainless steel has lower hardness, it is easier to process and has lower cost. Therefore, the entire tube-type dispensing head and dispensing valve device has lower processing difficulty and lower production cost.

Description

Technical Field

[0001] This utility model relates to the field of dispensing technology, and in particular to an embedded tube type dispensing head and a dispensing valve device having the same. Background Technology

[0002] Dispensing valves are core components in industrial automation, controlling the precise application of adhesives or other fluids. They are widely used in industries such as electronics assembly, semiconductor packaging, medical devices, automotive manufacturing, and LED lighting. Their core function is to precisely control fluid flow by starting / stopping the valve, accurately controlling the amount of adhesive dispensed each time, controlling the dispensing shape (dots, lines, or coatings), and adapting to different fluids, including those of varying viscosities, filler content, and chemical properties, such as adhesives, inks, greases, and fluxes.

[0003] Conventional dispensing valve devices using piezoelectric valves have a dispensing stop pin. The opening and closing of the dispensing head is controlled by the up-and-down movement of the dispensing stop pin. Therefore, the dispensing head usually consists of a support base with a funnel-shaped dispensing cavity inside and a dispensing needle connected to the bottom of the support base and communicating with the middle of the bottom of the funnel-shaped dispensing cavity. The dispensing stop pin moves downward at a high frequency and tightly presses against the bottom wall of the funnel-shaped dispensing cavity to seal the dispensing needle. Therefore, in actual use, the support base and dispensing needle are usually molded as a single piece and made of tungsten carbide or ceramic material to give it high hardness, good wear resistance and impact resistance, and maintain a long service life.

[0004] However, the inventor of this patent discovered that due to the huge market demand and the high frequency of replacement, the support base and dispensing needle are made of tungsten steel or ceramic material and molded as one piece, which makes the consumable cost high. In addition, because it is molded as one piece and the dispensing needle is very small, it increases the difficulty of mold opening during production and manufacturing, making the processing very difficult.

[0005] In response, the inventor of this patent, drawing on work experience, deeply considered the problems encountered in his work, reviewed a large amount of scientific research data and literature, and gradually conceived and designed this application through a novelty search to solve the relevant technical problems. Utility Model Content

[0006] This invention aims to at least partially solve one of the technical problems in the related art. Therefore, the purpose of this invention is to provide an embedded tube-type dispensing head and a dispensing valve device having therein.

[0007] To achieve one of the above objectives, the insert-type dispensing head according to an embodiment of the present utility model includes a support base and a dispensing needle;

[0008] The upper end of the support base has a funnel-shaped adhesive guiding cavity facing downwards, and the bottom of the support base has a fixed channel extending vertically into the bottom of the funnel-shaped adhesive guiding cavity; the dispensing needle is interference-fitted into the fixed channel, and its lower end extends downwards to form a lower extension portion exposed outside the lower part of the fixed channel.

[0009] In addition, the tube-type dispensing head according to the above embodiments of this utility model may also have the following additional technical features:

[0010] According to one embodiment of the present invention, the support base is made of tungsten steel or ceramic material; the dispensing needle is made of stainless steel material.

[0011] According to one embodiment of the present invention, the upper outer wall of the dispensing needle and the inner wall of the fixing channel are bonded together with a strong adhesive.

[0012] According to one embodiment of the present invention, the fixed channel includes a fixed channel A located at the upper part and a fixed channel B located at the lower part;

[0013] The inner diameter of the fixed channel A is slightly larger than the inner diameter of the fixed channel B; the outer wall of the upper end of the dispensing needle protrudes outward to form a ring of interference fit that is fixed to the outer edge of the fixed channel A, and the middle part of the dispensing needle is interference fit that is fixed to the fixed channel B.

[0014] According to one embodiment of the present invention, it also includes a T-shaped adhesive guide seat;

[0015] The T-shaped adhesive guide seat includes an adhesive guide plate arranged in a horizontal direction and an adhesive guide cylinder arranged in a vertical direction at the bottom center of the adhesive guide plate and integrally formed with the adhesive guide plate.

[0016] The upper surface of the guide plate has a downward-facing groove at the center for inserting the sealing pin, and its bottom is connected to the upper part of the guide cylinder. The upper surface of the guide plate has a guide channel on its left side that slopes downward and then to the lower right, connecting to the lower part of the groove. The support is fixedly attached to the bottom of the guide cylinder so that the funnel-shaped guide cavity is located directly below the guide cylinder and connected to the lower part of the guide cylinder. The inner diameter of the groove and the inner diameter of the guide cylinder are both slightly larger than the outer diameter of the sealing pin.

[0017] According to one embodiment of the present invention, the bottom of the guide tube is provided with a retaining groove facing upward, and the upper part of the support seat is interference-fitted into the retaining groove.

[0018] According to one embodiment of the present invention, it is characterized in that it further includes a locking sleeve for securing the supporting seat;

[0019] The top of the locking sleeve is open and the bottom is narrowed. The locking sleeve is detachably fitted onto the lower end of the adhesive guide tube and tightly secures the lower part of the support. The lower extension of the dispensing needle extends downward from the narrowed opening.

[0020] According to one embodiment of the present invention, the locking sleeve is threaded onto the lower end of the adhesive guide cylinder.

[0021] According to one embodiment of the present invention, the adhesive guide tube is an extended adhesive guide tube with a length of L, wherein L ≥ 2.0 cm.

[0022] To achieve the second objective mentioned above, the dispensing valve device according to the present utility model includes a glue tank for storing glue liquid, a dispensing pin, and a piezoelectric valve for driving the dispensing pin to move up and down, and also includes the tube-type dispensing head as described above.

[0023] The glue bucket and the piezoelectric valve are fixedly mounted side by side on the upper surface of the glue guide plate, and the bottom of the glue bucket is connected to the upper left end of the glue guide channel; the upper end of the glue-closing strike pin is connected to the piezoelectric valve, and the lower end passes through the through groove and the glue guide cylinder and is tightly pressed against the bottom of the funnel-shaped glue guide cavity, so as to move up and down under the control of the piezoelectric valve to open / close the glue dispensing needle accordingly.

[0024] The beneficial effects of this utility model are:

[0025] Firstly, in the specific implementation of the inlay-type dispensing head and dispensing valve device provided in this application, the inlay-type dispensing head includes a separately disposed support seat and a dispensing needle, which are manufactured separately and then assembled together. The support seat is made of tungsten carbide or ceramic material, and the dispensing needle is made of stainless steel material. Because the dispensing needle made of stainless steel has lower hardness, it is easier to process and has lower cost. Thus, the entire inlay-type dispensing head and dispensing valve device has low processing difficulty and low production cost.

[0026] Secondly, regarding the aforementioned insert-type dispensing head, its fixing channels include an upper fixing channel A and a lower fixing channel B. The inner diameter of the fixing channel A is slightly larger than the inner diameter of the fixing channel B. The outer wall of the upper end of the dispensing needle protrudes outward to form an interference fit that secures the outer edge of the fixing channel A. The middle part of the dispensing needle is also interference fit secured to the fixing channel B. In this way, the fixing channel B can better support and lift the outer edge, so that when the dispensing needle is inserted into the fixing channel from top to bottom, its insertion position is controllable. This can play a certain role in positioning the insertion position of the dispensing needle and securing and preventing the dispensing needle from falling out, making the insert-type dispensing head provided in this application very stable and reliable in use.

[0027] Thirdly, this application makes the glue guide tube an extended glue guide tube, with a length of L, and L≥2.0cm. In this way, the upper and lower lengths of the glue guide tube of this application are sufficient, so that the embedded tube type glue dispensing head of this application can be used for glue dispensing operations in areas with relatively small dispensing space, thus making the embedded tube type glue dispensing head of this application highly adaptable.

[0028] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the overall structure of the embedded tube dispensing head of this utility model in Embodiment 1. Figure 1 ;

[0031] Figure 2 This is a schematic diagram of the overall structure of the embedded tube dispensing head of this utility model in Embodiment 1. Figure 2 ;

[0032] Figure 3 This is a longitudinal sectional view of the insert-type dispensing head of this utility model in Embodiment 1;

[0033] Figure 4 This is an exploded longitudinal sectional view of the embedded tube dispensing head of this utility model in Embodiment 1;

[0034] Figure 5This is a schematic diagram of the overall structure of the embedded tube dispensing head of this utility model in Embodiment 2. Figure 1 ;

[0035] Figure 6 This is an analysis of the embedded tube dispensing head of this utility model in Embodiment 2. Figure 1 ;

[0036] Figure 7 This is a schematic diagram of the overall structure of the embedded tube dispensing head of this utility model in Embodiment 2. Figure 2 ;

[0037] Figure 8 This is an analysis of the embedded tube dispensing head of this utility model in Embodiment 2. Figure 2 ;

[0038] Figure 9 This is a longitudinal sectional view of the embedded tube dispensing head of this utility model in Embodiment 2;

[0039] Figure 10 This is a schematic diagram of the overall structure of the dispensing valve device of this utility model in Embodiment 3;

[0040] Figure 11 This is a longitudinal sectional view of the dispensing valve device of this utility model in Embodiment 3;

[0041] Figure label:

[0042] 1000-type insert dispensing head;

[0043] Lifting seat 10;

[0044] Funnel-shaped adhesive guiding cavity 101;

[0045] Fixed channel 102;

[0046] Fixed channel A1021;

[0047] Fixed channel B1022;

[0048] Glue dispensing needle 20;

[0049] Lower extension 201;

[0050] Support the outer edge 202;

[0051] T-shaped adhesive guide seat 30;

[0052] 301 adhesive guide plate;

[0053] Through slot 3011;

[0054] Adhesive channel 3012;

[0055] Adhesive channel A30121;

[0056] Adhesive channel B30122;

[0057] 3013 sealing ring;

[0058] Cleaning passage 3014;

[0059] Sealing plug 3015;

[0060] Fixing hole 3016;

[0061] 302 adhesive guide tube;

[0062] 3021 locking groove;

[0063] Locking sleeve 40;

[0064] 401 with narrowed neck;

[0065] Dispensing valve device 2000;

[0066] Glue bucket 50;

[0067] 60mm sealing pin;

[0068] Piezoelectric valve 70;

[0069] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0070] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0071] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0072] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0073] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0074] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0075] The following describes in detail, with reference to the accompanying drawings, an embedded tube type dispensing head 1000 and a dispensing valve device 2000 having therein, embodiments of the present invention.

[0076] Example 1

[0077] Reference Figures 1 to 4 As shown;

[0078] According to the embodiment of the present utility model, the embedded tube type dispensing head 1000 includes a support 10 and a dispensing needle 20.

[0079] The support base 10 has a funnel-shaped adhesive guiding cavity 101 with its upper end facing downward, and a fixed channel 102 extending vertically to the bottom of the funnel-shaped adhesive guiding cavity 101 at its bottom. The dispensing needle 20 is interference-fitted into the fixed channel 102, and its lower end extends downward to form a lower extension 201 exposed outside the lower part of the fixed channel 102.

[0080] Preferably, in this technical solution, according to an embodiment of the present utility model, the support 10 is made of tungsten steel or ceramic material; the dispensing needle 20 is made of stainless steel.

[0081] Based on the above, it is clear that in specific implementation, this application is mainly used as an embedded tube dispensing head 1000.

[0082] Specifically, when applying this application, the dispensing needle 20 is very small. For traditional dispensing heads, the support and the dispensing needle are integrally formed and are mainly made of tungsten steel or ceramic materials to facilitate the work with the dispensing needle. Because of their high hardness, the integrally formed support and dispensing needle are difficult to process and have high production costs.

[0083] Therefore, this patent uses different materials so that the supporting seat 10 and the dispensing needle 20 are manufactured separately and then assembled. The supporting seat 10 is made of tungsten steel or ceramic, and the dispensing needle 20 is made of stainless steel. Because the dispensing needle 20 made of stainless steel has a lower hardness, it is easier to process and has a lower cost. Thus, the overall processing difficulty of the embedded tube dispensing head 1000 of this application is low and the production cost is low.

[0084] Furthermore, through the above-mentioned optimized design, the whole constituted by this application is highly practical and has a good effect in use.

[0085] Furthermore, in a specific implementation, according to one embodiment of the present invention, the upper outer wall of the dispensing needle 20 and the inner wall of the fixing channel 102 are bonded together with a strong adhesive.

[0086] When there is a small gap between the upper outer wall of the dispensing needle 20 and the inner wall of the fixed channel 102, strong adhesive can be injected to bond them together. This makes the connection between the needle and the support seat 10 stable and not easy to loosen, making the tube-type dispensing head 1000 described in this application reliable.

[0087] Preferably, in this technical solution, according to an embodiment of the present utility model, the fixed channel 102 includes a fixed channel A1021 located at the upper part and a fixed channel B1022 located at the lower part;

[0088] Based on this, in this application, the inner diameter of the fixed channel A1021 is slightly larger than the inner diameter of the fixed channel B1022; the outer wall of the upper end of the dispensing needle 20 protrudes outward to form a ring of interference fit that is fixed to the outer edge 202 of the fixed channel A1021, and the middle part of the dispensing needle 20 is interference fit that is fixed to the fixed channel B1022.

[0089] In this regard, it is clear that in the actual invention of this application, since the inner diameter of the fixed channel A1021 is slightly larger than the inner diameter of the fixed channel B1022, the outer edge 202 of the dispensing needle 20 is interference-fitted into the fixed channel A1021, and the middle part of the dispensing needle 20 is interference-fitted into the fixed channel B1022. This allows the fixed channel B1022 to better support the outer edge 202, so that when the dispensing needle 20 is inserted into the fixed channel 102 from top to bottom, its insertion position is controllable. This can play a certain role in positioning the insertion position of the dispensing needle 20 and in securing and preventing the dispensing needle 20 from falling out.

[0090] Furthermore, through the above-mentioned optimized design, the overall performance of the tube-type dispensing head 1000 described in this application can be effectively improved.

[0091] Example 2

[0092] Reference Figures 5 to 9 As shown;

[0093] Based on Embodiment 1, according to an embodiment of the present invention, the tube-type dispensing head 1000 of this application further includes a T-shaped dispensing guide seat 30;

[0094] The T-shaped adhesive guide seat 30 includes an adhesive guide plate 301 arranged in a horizontal direction and an adhesive guide cylinder 302 arranged in a vertical direction at the bottom center of the adhesive guide plate 301 and integrally formed with the adhesive guide plate 301.

[0095] Based on this, the upper end face of the glue guide plate 301 has a downward-facing groove 3011 for inserting the glue-closing ejector pin 60 and whose bottom is connected to the upper part of the glue guide cylinder 302; a sealing ring 3013 suitable for interference fit insertion of the glue-closing ejector pin 60 is fixed in the upper part of the groove 3011; a glue guide channel 3012 connected to the lower part of the groove 3011 is opened on the left side of the upper end face of the glue guide plate 301, which is inclined downward and then to the lower right; the support seat 10 is fixedly attached to the bottom of the glue guide cylinder 302 so that the funnel-shaped glue guide cavity 101 is located directly below the glue guide cylinder 302 and connected to the lower part of the glue guide cylinder 302; the inner diameter of the groove 3011 and the inner diameter of the glue guide cylinder 302 are both slightly larger than the outer diameter of the glue-closing ejector pin 60 and larger than the inner diameter of the glue dispensing needle 20.

[0096] Therefore, it can be clearly understood that, on the one hand, by connecting a glue tank 50 or other glue storage container to the upper left part of the glue guide channel 3012, glue can be introduced into the glue guide channel 3012. The introduced glue can then flow along the through groove 3011 and the glue guide cylinder 302 into the funnel-shaped glue guide cavity 101, and then flow out through the lower end of the glue dispensing needle 20 to achieve glue dispensing operation at the required position on the surface of the product that needs glue. On the other hand, by inserting a glue-closing ejector pin 60 into the through groove 3011, its lifting mechanism can be controlled by an external piezoelectric valve 70 or other lifting device. The up-and-down movement opens / closes the upper end of the dispensing needle 20, allowing it to open within a set time (at which time the lower end of the matching sealing pin 60 is facing upwards away from the upper part of the fixed channel A1021) and block within a set time (at which time the lower end of the matching sealing pin 60 is tightly pressed against the upper part of the fixed channel A1021), thereby enabling the intermittent dispensing operation of the embedded tube type dispensing head 1000 on the required position of the product surface that needs dispensing using the present application.

[0097] Furthermore, in a specific implementation, according to one embodiment of the present utility model, the bottom of the guide tube 302 is provided with a retaining groove 3021 facing upward, and the upper part of the support seat 10 is interference-fitted into the retaining groove 3021.

[0098] In this way, the support seat 10 is fixed and stable and not easily displaced circumferentially, and the dispensing needle 20 fixed at its bottom is also fixed and stable and not easily displaced circumferentially.

[0099] Furthermore, based on the above-mentioned solutions, according to an embodiment of the present utility model, the tube-type dispensing head 1000 of this application further includes a locking sleeve 40 for locking the support seat 10;

[0100] The locking sleeve 40 has an open top and a narrowed bottom 401. The locking sleeve 40 is detachably fitted onto the lower end of the adhesive guide cylinder 302 and tightly secures the lower part of the support seat 10. The lower extension 201 of the dispensing needle 20 extends downward from the narrowed bottom 401.

[0101] Preferably, in this technical solution, according to an embodiment of the present utility model, the locking sleeve 40 is threadedly screwed onto the lower end of the adhesive guide cylinder 302.

[0102] Therefore, it can be clearly stated that:

[0103] On the one hand, when the locking sleeve 40 is fitted outside the lower end of the glue guide cylinder 302 and tightly secures the lower part of the support 10, the support 10 can be fixed stably and is not easy to move up and down. Similarly, the glue dispensing needle 20 fixed at its bottom can also be fixed stably and is not easy to move up and down. As a result, the whole structure is not easy to move circumferentially or up and down when it is fixed, making it reliable in use.

[0104] On the other hand, since the locking sleeve 40 is threaded onto the lower end of the glue guide cylinder 302, it is detachable. Therefore, when the glue dispensing needle 20 is blocked, the locking sleeve 40 can be removed to replace the whole consisting of the support seat 10 and the glue dispensing needle 20, or to unclog and maintain the whole before reinstallation. This makes the reliability of this application better and more comprehensive. It does not require replacing the T-shaped glue guide seat 30 and the locking sleeve 40, resulting in low usage and maintenance costs.

[0105] Preferably, in this technical solution, according to an embodiment of the present utility model, the adhesive guide tube 302 is an extended adhesive guide tube 302 with a length of L, wherein L≥2.0cm.

[0106] It should be noted that traditional glue guide tubes have very short vertical lengths. For areas with limited space for glue application, such as the inner wall of a mobile phone case, this limited length restricts their use, making it difficult for the glue needle at the bottom to reach such areas. To address this, this application uses an elongated glue guide tube 302 with a length of L ≥ 2.0 cm. This ensures that the glue guide tube 302 has sufficient vertical length, allowing the embedded tube-type glue dispensing head 1000 to be used for glue application in areas with limited space, thus enhancing the adaptability of the embedded tube-type glue dispensing head 1000.

[0107] Example 3

[0108] Reference Figures 10 to 11 As shown;

[0109] Based on Embodiment 2, the dispensing valve device 2000 according to this utility model embodiment includes a glue tank 50 for storing glue liquid, a glue-closing striker 60 and a piezoelectric valve 70 for driving the glue-closing striker 60 to move up and down, and also includes a tube-type dispensing head 1000 as described in Embodiment 2 above.

[0110] The glue bucket 50 and the piezoelectric valve 70 are fixedly mounted side by side on the upper end face of the glue guide plate 301, and the bottom of the glue bucket 50 is connected to the upper left end of the glue guide channel 3012; the upper end of the glue-closing strike pin 60 is connected to the piezoelectric valve 70, and the lower end passes through the through groove 3011 and the glue guide cylinder 302 and is tightly pressed against the bottom of the funnel-shaped glue guide cavity 101, so that it can move up and down under the control of the piezoelectric valve 70 to open / close the glue dispensing needle 20 accordingly.

[0111] Therefore, it can be clearly understood that, on the one hand, by connecting the glue tank 50 containing the glue liquid to the upper left part of the glue guide channel 3012, the glue liquid can be introduced into the glue guide channel 3012. The introduced glue liquid can then flow along the through groove 3011 and the glue guide cylinder 302 into the funnel-shaped glue guide cavity 101, and then flow out through the lower end of the glue dispensing needle 20 to achieve the glue dispensing operation at the required position on the surface of the product that needs glue. On the other hand, by inserting the glue-closing strike pin 60 into the through groove 3011, the upper part of the product can be controlled by the external piezoelectric valve 70. The downward movement opens / closes the upper end of the dispensing needle 20 accordingly, so as to open the upper end of the dispensing needle 20 within a set time (at this time, the lower end of the matching sealing pin 60 is facing upward away from the upper part of the fixed channel A1021) and block the upper end of the dispensing needle 20 within a set time (at this time, the lower end of the matching sealing pin 60 is tightly pressed against the upper part of the fixed channel A1021), so as to realize the dispensing valve device 2000 of this application to intermittently perform dispensing operations on the required positions on the surface of the product that needs dispensing.

[0112] The third embodiment of this application also adopts the tube-type dispensing head 1000 described in the first and second embodiments. Therefore, the technical effects produced are exactly the same as those produced in the first and second embodiments of this application, and will not be repeated here.

[0113] It should be added that, in specific implementation, according to the embedded tube dispensing head 1000 and the dispensing valve device 2000 having it provided in the embodiments of this utility model, whether it is the above embodiment one or the above embodiment two, the adhesive flow channel 3012 includes an adhesive flow channel A30121 arranged vertically and an adhesive flow channel B30122 arranged obliquely. The upper end of the adhesive flow channel B30122 is connected to the lower end of the adhesive flow channel A30121, and the lower end of the adhesive flow channel B30122 is connected to the lower part of the through groove 3011. The left side wall of the adhesive guide plate 301 is provided with a cleaning channel 3014 that extends to the adhesive flow channel B30122. The cleaning channel 3014 is coaxially arranged with the adhesive flow channel B30122 so that they are on the same straight line, and a sealing plug 3015 is provided at the outer end of the cleaning channel 3014 for pluggability.

[0114] Thus, when the sealing plug 3015 is removed to open the cleaning channel 3014, the interior of the adhesive channel A30121 and the interior of the adhesive channel B30122 can be cleaned and maintained, resulting in a long service life for this application.

[0115] Furthermore, in specific implementation, the upper surface of the adhesive guide plate 301 is also provided with fixing holes 3016 for fixing the adhesive bucket 50 and the piezoelectric valve 70 used in conjunction. As for the piezoelectric valve 70, it is an existing mature technology and a mature product, and it is widely used in the field of dispensing. Here, its details will not be elaborated.

[0116] Other embodiments, etc., will not be described here.

[0117] In summary, the inlay-type dispensing head 1000 and the dispensing valve device 2000 with it provided in this application, in specific implementation, include a separate support 10 and a dispensing needle 20, which are manufactured separately and then assembled together. The support 10 is made of tungsten carbide or ceramic, and the dispensing needle 20 is made of stainless steel. Because the hardness of the dispensing needle 20 made of stainless steel is relatively low, it is easy to process and has a low cost. Thus, the entire inlay-type dispensing head 1000 and the dispensing valve device 2000 with it have low processing difficulty and low production cost.

[0118] Furthermore, for the aforementioned insert-type dispensing head 1000, since its fixing channel 102 includes an upper fixing channel A1021 and a lower fixing channel B1022, the inner diameter of the fixing channel A1021 is slightly larger than the inner diameter of the fixing channel B1022. The outer wall of the upper end of the dispensing needle 20 protrudes outward to form an interference fit that secures the outer edge 202 of the fixing channel A1021. The middle part of the dispensing needle 20 is interference fit secured to the fixing channel B1022. In this way, the fixing channel B1022 can better support the outer edge 202, so that when the dispensing needle 20 is inserted into the fixing channel 102 from top to bottom, its insertion position is controllable. This can play a certain role in positioning the insertion position of the dispensing needle 20 and in securing and preventing the dispensing needle 20 from falling out, making the insert-type dispensing head 1000 provided in this application very stable and reliable in use.

[0119] Furthermore, this application makes the glue guide tube 302 an elongated glue guide tube 302, with a length of L, and L≥2.0cm. In this way, the glue guide tube 302 of this application has sufficient vertical length, so that the embedded tube type dispensing head 1000 of this application can be used for dispensing operations in areas with relatively small dispensing space, thus making the embedded tube type dispensing head 1000 of this application highly adaptable.

[0120] Furthermore, the tube-type dispensing head 1000 and the dispensing valve device 2000 with it provided in this application are indeed highly practical and have excellent performance, which makes this application have great market promotion value and will surely be very popular and widely adopted.

[0121] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0122] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A tube-type dispensing head, characterized in that, Including the support base and the glue dispensing needle; The upper end of the support base has a funnel-shaped adhesive guiding cavity facing downwards, and the bottom of the support base has a fixed channel extending vertically into the bottom of the funnel-shaped adhesive guiding cavity; the dispensing needle is interference-fitted into the fixed channel, and its lower end extends downwards to form a lower extension portion exposed outside the lower part of the fixed channel.

2. The insert-type dispensing head according to claim 1, characterized in that, The support base is made of tungsten carbide or ceramic; the dispensing needle is made of stainless steel.

3. The insert-type dispensing head according to claim 1, characterized in that, The upper outer wall of the dispensing needle and the inner wall of the fixed channel are bonded together with a strong adhesive.

4. The insert-type dispensing head according to claim 1, characterized in that, The fixed channel includes a fixed channel A located at the upper part and a fixed channel B located at the lower part; The inner diameter of the fixed channel A is slightly larger than the inner diameter of the fixed channel B; the outer wall of the upper end of the dispensing needle protrudes outward to form a ring of interference fit that is fixed to the outer edge of the fixed channel A, and the middle part of the dispensing needle is interference fit that is fixed to the fixed channel B.

5. The insert-type dispensing head according to claim 1, characterized in that, It also includes a T-shaped adhesive guide seat; The T-shaped adhesive guide seat includes an adhesive guide plate arranged in a horizontal direction and an adhesive guide cylinder arranged in a vertical direction at the bottom center of the adhesive guide plate and integrally formed with the adhesive guide plate. The upper end face of the glue guide plate has a downward-facing groove for inserting the glue-closing strike pin, and its bottom is connected to the upper part of the glue guide cylinder. The upper end face of the glue guide plate has a glue-guiding channel that connects to the lower part of the groove on the left side, which is inclined downward and then to the lower right. The support seat is fixedly attached to the bottom of the glue guide cylinder so that the funnel-shaped glue-guiding cavity is located directly below the glue guide cylinder and connected to the lower part of the glue guide cylinder. The inner diameter of the groove and the inner diameter of the glue guide cylinder are both slightly larger than the outer diameter of the glue-closing strike pin.

6. The insert-type dispensing head according to claim 5, characterized in that, The bottom of the guide tube is provided with a locking groove facing upwards, and the upper part of the support is interference-fitted into the locking groove.

7. The insert-type dispensing head according to claim 6, characterized in that, It also includes a locking sleeve for securing the support seat; The top of the locking sleeve is open and the bottom is narrowed. The locking sleeve is detachably fitted onto the lower end of the adhesive guide tube and tightly secures the lower part of the support. The lower extension of the dispensing needle extends downward from the narrowed opening.

8. The insert-type dispensing head according to claim 7, characterized in that, The locking sleeve is threaded onto the lower end of the adhesive guide cylinder.

9. The insert-type dispensing head according to claim 5, characterized in that, The adhesive guide tube is an extended adhesive guide tube with a length of L, where L ≥ 2.0 cm.

10. A dispensing valve device, comprising a glue tank for holding glue liquid, a dispensing pin, and a piezoelectric valve for driving the dispensing pin to move up and down, characterized in that, It also includes the insert-type dispensing head as described in any one of claims 5-9; The glue bucket and the piezoelectric valve are fixedly mounted side by side on the upper surface of the glue guide plate, and the bottom of the glue bucket is connected to the upper left end of the glue guide channel; the upper end of the glue-closing strike pin is connected to the piezoelectric valve, and the lower end passes through the through groove and the glue guide cylinder and is tightly pressed against the bottom of the funnel-shaped glue guide cavity, so as to move up and down under the control of the piezoelectric valve to open / close the glue dispensing needle accordingly.

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